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Rajesh Uppal

Dragon’s Arsenal: China’s Expanding Defence Exports and the Global Balance of Power

  Over the past two decades, China has transitioned from a major arms importer to a growing global arms exporter, leveraging state-led innovation, military-industrial integration, and a flexible approach to foreign military sales. With increasing investments in indigenous defense capabilities, China is no longer just modernizing its own armed forces—it …

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Beyond the Horizon: Advanced Propulsion and Deorbiting Technologies for Responsible CubeSat End-of-Life

CubeSats have emerged as game-changers in space exploration, offering an accessible, low-cost entry point for universities, startups, and governments alike. Their standardized, modular design allows rapid development and deployment for a wide range of missions, from remote sensing and atmospheric monitoring to communications and deep-space experiments. Yet as the complexity …

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Photonic Integrated Circuits: Transformative Technologies and Applications for the Photonics Era

Photonic Integrated Circuits (PICs) are transforming how we process, transmit, and interact with information by utilizing light instead of electrons. These advanced chips leverage photons to deliver ultra-fast data transmission, superior energy efficiency, and higher bandwidth than traditional electronic circuits. Once confined to research labs, PICs now drive innovation across …

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VLEO Beyond the Heat Shield: DARPA’s Quest for Spacecraft Skins That Defy Orbital Drag and Atomic Decay

The Inescapable Challenge of VLEO As the space domain becomes increasingly congested, contested, and competitive, the United States is turning its eyes to Very Low Earth Orbit (VLEO)—typically between 180 km and 450 km altitude—as the next frontier for tactical advantage. This region offers unmatched benefits: reduced latency for communications, …

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The Cutting Edge of Light Control: Nonlinear Optical Materials and Devices Revolutionizing Technology

Beyond Linearity: Fundamentals Reimagined Nonlinear optical (NLO) materials and devices manipulate light in ways that defy traditional physics—enabling quantum communication, photonic computing, and ultrafast sensing. Instead of behaving proportionally to incoming electromagnetic fields, these materials exhibit nonlinear responses when illuminated by intense lasers. This manifests in processes like frequency conversion …

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Beyond Silicon: Why Aluminum Nitride Could Revolutionize Power Electronics and UV Lasers

  The Promise Unlocked For decades, silicon has served as the cornerstone of semiconductor technology, but its performance falters under extreme thermal and electrical conditions. Enter aluminum nitride (AlN)—an ultrawide-bandgap (UWBG) material with a remarkable bandgap of 6.1 eV, placing it far ahead of conventional materials like silicon (1.1 eV), …

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Revolutionizing Hull Design: Engineering Ships for the Wind Propulsion Era

Introduction: Hull Optimization at the Heart of Wind-Powered Shipping As the global shipping industry works to balance its pivotal role in trade with mounting environmental responsibilities, reducing greenhouse gas emissions has become an urgent priority. With maritime transport contributing nearly 3% of global emissions, the push for greener propulsion technologies …

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Orbital Armor: How Militaries Are Securing Satellite Communications Against Electronic Warfare and Cyber Threats

The Contested Space Domain In modern military operations, information dominance is paramount. Satellite communication systems play a critical role in maintaining beyond-line-of-sight (BLOS) connectivity, allowing widely distributed or forward-deployed units—such as special operations teams in remote theaters—to maintain constant contact with command centers and allied forces. These capabilities are not …

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The Multimode Sensor Revolution: One Aperture to Rule All Domains

The End of Federated Systems For decades, military aircraft, ships, and land systems have been overloaded with a patchwork of dedicated sensors and antenna arrays. Each mission-specific system—radar dishes for targeting, electronic warfare (EW) arrays for jamming, SATCOM domes for communication, and SIGINT pods for interception—demanded its own physical aperture …

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2025’s Space Connectivity Breakthrough: Hybrid Optical and Microwave ISLs Powering the New Orbital Internet

Introduction: The Rise of Intersatellite Connectivity in the Space Age In today’s rapidly advancing space and communication landscape, Intersatellite Links (ISLs) are emerging as a cornerstone of modern satellite constellations. These links—whether microwave or laser-based—enable satellites to communicate directly with each other, forming a seamless orbital mesh network that bypasses …

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